Disjointing device for automatic pistols



Apr. 17, 1923.

N. PIEPER DISJOINTING DEVICE FOR AUTOMATIC PISTOLS Filed Feb. 7 1921 flm Viulwa Patented Apr. 17, 1923.

near an sir re s NICOLAS lPIIlSJIE-IELR OF LIEGE, EELGIUM.

DISJOINTING DEVICE FOR AUTOMATIC PISTOLS.

Application filed February 7, 1921.

To cal-Z whom it may concern:

Be it known that I, NICOLAS PIEPER, a subject of the King of the Belgians, residing at Liege, Belgium, have invented certain new and useful improvements in Disjointing Devices for Automatic Pistols (for which I have filed an application in France, Feb. 6th, 1920), of which the following is a specification.

The subject of this invention is an automatic pistol comprising a barrel secured on the stock and a sliding member or slide covering the barrel'over its whole length and extending over the rear part of the arm.

The bolt forms part of the'slide, and its recoil is delayed by means of a recovering spring which acts upon a shoulder supported by a front part of the said slide.

According to this invention the recovering spring may be held in compressed position by a member secured on the stock. This device allows taking the arm to pieces without the slightest difliculties.

The member by which the recovering spring is held in compressed position is operated from the outside. It may consist in an elastic plate secured on the stock and provided with a claw, the latter being in a position to catch said spring whenever pressure is exerted upon the elastic plate.

The accompanying drawing shows by way of example one form of execution of the present invention:

Figure 1 is a part longitudinal section of the pistol in its locked position.

Figure 2 is a plan view thereof.

Figure 3 is a front view.

Figure 4 is a section like that in Fig. 1, but showing the pistol in its unlocked position. Figure 5 is a plan view thereof.

Figure 6 is a cross section through A-B of Fig. 4.

The barrel 1 is screwed to the sleeve 2, which forms part of the stock 3. The slide 4, which is partly constituted by the bolt, covers the whole barrel 1 and extends over the rear end of the arm. The slide is provided with a shoulder 5, upon which acts the recovering spring 6 by means of the abutment 7 The recovering spring 6 can be held in compressed position in the following manner:

An elastic plate 9 is secured on the stock Serial No. 443,154.

3 by the screw 8. This plate is provided on its inner face with a claw 10.

The ordinary position of the elastic plate 9 is that shown in Fig. 2 to which position the plate constantly tends to come back due to its elasticity. 1n ths position it has no influence on the recovering spring 6.

When it is desired to hold the recovering spring 6 in compressed position, into which it is brought by a backward movement impartedto the slide 4, pressure is exerted upon the elastic plate 9 as to introduce the claw 10 into the chamber 11 of the recovering spring 6 (Figs. %6).

By bringing the slide 4 in its forward position, the spring buffer 7 will be kept back by the claw 10, and it retains the spring in its compressed position. The abutment 7 is hollowed at its front face 12, so as to retain the claw 10 in spite of the action of the elastic plate 9, which tends to draw it out of the chamber 11.

If it is desired to liberate the spring 6, it will be sufficient to move the abutment 7 slightly backward by means of the slide l.

Since no pressure is now exerted on the elastic plate 9, the claw 10 will leave the chamber 11 and will take its ordinary position as shown in Fig. 2. and the recovering spring, being now liberated, acts again in its normal way. In taking the arm to pieces one starts by compressing the recovering spring and holding it by means of the claw 10 as specified. Then, after the barrel 1 has been unscrewed, the slide 4- is drawn backward and its shoulder 5 is brought out through the hole 13 provided in the top part of the chamber 11 of the stock 3.

This device facilitates considerably the taking to pieces and the re-assembling of the arm.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is:

1. An automatic pistol comprising in combination a stock member having an undercut recess longtudinally thereof and an enlarged opening at the rear end of the recess, a slide member having a shoulder slidable in the recess, a recovering spring normally holding the shoulder forward in the recess, and a normally inoperative latch on the stock member and behind said opening, said latch being adapted to be operated to restrain the spring in compressed position to permit the shoulder to be withdrawn from the recess through the opening.

2. In an automatic pistol in combination a stock member having an undercut recess longitudinally thereof and an enlarged opening at the rear end of the recess, a slide member having a shoulder slidable in the recess, a recovering spring normally holding the shoulder forward in the recess, a fiat leaf spring secured to the stool: member and having its free end normally positioned away from the stock member, a hook rigidly secured to the free end of the leai spring and adapted when the spring is pressed to enter said recess and to retain the recovering spring in compressed position to permit the shoulder to be Withdrawn through the openmg in the recess.

3. In an automatic pistol in combination a stock member having an undercut recess longitudinally thereof and an enlarged opening at the rear end of the recess, a slide member having a shoulder slidable in the recess, a recovering spring normally holding the shoulder forward in the recess, an abutment between the spring and the shoulder, said abutment having in its forward face a central depression and anotch between said depression and its edge, a flat leaf spring se cured to the stock member and having its free end normally positioned away from the stock member, a hook rigidly secured to the :lree end of the leaf spring and adapted when said leaf spring is pressed to enter the notch and engage the depression in the abutment to retain the latter behind the opening in the recess.

In testimony whereof I affix my signature.

NICOLAS PIEPER \Vitnesses CURTIS T. EVERETT, CH. HANSENNY. 

